A duck walks into a bar and orders a drink. After his first sip, he hears a high-pitched voice.
“Hey duck! Nice tail feathers!” it says.
The duck looks around, doesn’t see anything, and quickly shrugs it off. After a bit, he takes another sip and hears the voice again.
“Hey duck! Sweet sombrero! ”
Again, the duck looks around and sees nothing. Baffled by the phantom voice, he calls the bartender over.
“Hey barkeep, what is that high-pitched voice I keep hearing?”
“Oh, those are the peanuts,” replies the bartender. “They’re complimentary.”